Conchological Society of Great Britain & Ireland: non-marine molluscs (rare and scarce species)
The records in this dataset are the results of a compilation of records of rare and scarce species within Great Britain and Nothern Ireland. It was assembled and maintained by Michael Kerney on behalf of the Conchological Society and was subsequently digitised. The exact source of digitisation is unclear and the quality of the data are still being verified by the Society. All the survey data were collected by members of the Conchological Society. Recording is still continuing but records are added to a separate dataset.
The dataset covers Great Britain and Northern Ireland. The sampling is biased towards England with a lower level of sampling in Scotland. Note that some effort was made ahead of the publication of the atlas to sample areas which had been under recorded.
To gain baseline data about the distribution of non-marine molluscs in the UK and Ireland.
Initial validation of the records was carried out by automatically checking that the grid reference occurred within the recorded Vice County stated. Work is currently underway to verifiy the quality of the data against the original source data.
The scheme relies heavily on adhoc records provided by Society members. However, prior to the publication of the atlas (1999) significant efforts were made to survey areas which had been undersampled. While efforts were made to try and include a range of habitats in these areas, the sampling was not as thorough and rarer species may well have been overlooked.
Conchological Society of Great Britain & Ireland (2017), Conchological Society of Great Britain & Ireland: non-marine molluscs (rare and scarce species). Occurrence dataset
Looking up... the number of records that can be accessed through the NBN Atlas. This resource was last checked for updated data on 08 Jun 2020. The most recent data was published on 08 Jun 2020.Click to view records for the Conchological Society of Great Britain & Ireland: non-marine molluscs (rare and scarce species) resource.